Degradation mechanisms and toxicity determination of bisphenol A by FeOx-activated peroxydisulfate under ultraviolet light.

IF 2.2 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Environmental Technology Pub Date : 2025-01-01 Epub Date: 2024-03-31 DOI:10.1080/09593330.2024.2335670
Hongbo Peng, Hongyan Gu, Zhimin Xu, Guomei Xiong, Peng Gao, Siyao Wang, Xiongchao Li, Fangfang Li
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引用次数: 0

Abstract

Ultraviolet light (UV)-assisted advanced oxidation processes (AOPs) are commonly used to degrade organic contaminants. However, this reaction system's extensive comprehension of the degradation mechanisms and toxicity assessment remains inadequate. This study focuses on investigating the degradation mechanisms and pathways of bisphenol A (BPA), generation of reactive oxygen species (ROS), and toxicity of degradation intermediates in UV/PDS/ferrous composites (FeOx) systems. The degradation rate of BPA gradually increased from the initial 11.92% to 100% within 120 min. Sulfate radicals (SO4.-), hydroxyl radicals (.OH), superoxide anions (O2.-), and singlet oxygen (1O2) were the primary factors in the photocatalytic degradation of BPA in the UV/PDS/FeOx systems. The main reactions of BPA in this system were deduced to be β-bond cleavage, hydroxyl substitution reaction, hydrogen bond cleavage, and oxidation reaction. A trend of decreasing toxicity for the degradation intermediates of BPA was observed according to the toxicity investigations. The efficient degradation of BPA in UV/PDS/FeOx systems provided theoretical data for AOPs, which will improve the understanding of organic contaminants by FeOx in natural industry wastewater.

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在紫外光下,FeOx 活性过氧化二硫酸盐对双酚 A 的降解机理和毒性测定。
紫外线(UV)辅助高级氧化工艺(AOPs)通常用于降解有机污染物。然而,这种反应系统对降解机理和毒性评估的广泛理解仍然不足。本研究主要探讨了双酚 A(BPA)在紫外/PDS/铁复合材料(FeOx)系统中的降解机理和途径、活性氧(ROS)的生成以及降解中间产物的毒性。在 120 分钟内,双酚 A 的降解率从最初的 11.92% 逐渐增加到 100%。硫酸根自由基(SO4.-)、羟自由基(.OH)、超氧阴离子(O2.-)和单线态氧(1O2)是 UV/PDS/FeOx 系统光催化降解双酚 A 的主要因素。推断双酚 A 在该体系中的主要反应为 β 键裂解、羟基取代反应、氢键裂解和氧化反应。毒性研究表明,双酚 A 降解中间产物的毒性呈下降趋势。UV/PDS/FeOx 系统对双酚 A 的高效降解为 AOPs 提供了理论数据,这将提高人们对天然工业废水中 FeOx 降解有机污染物的认识。
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来源期刊
Environmental Technology
Environmental Technology 环境科学-环境科学
CiteScore
6.50
自引率
3.60%
发文量
0
审稿时长
4 months
期刊介绍: Environmental Technology is a leading journal for the rapid publication of science and technology papers on a wide range of topics in applied environmental studies, from environmental engineering to environmental biotechnology, the circular economy, municipal and industrial wastewater management, drinking-water treatment, air- and water-pollution control, solid-waste management, industrial hygiene and associated technologies. Environmental Technology is intended to provide rapid publication of new developments in environmental technology. The journal has an international readership with a broad scientific base. Contributions will be accepted from scientists and engineers in industry, government and universities. Accepted manuscripts are generally published within four months. Please note that Environmental Technology does not publish any review papers unless for a specified special issue which is decided by the Editor. Please do submit your review papers to our sister journal Environmental Technology Reviews at http://www.tandfonline.com/toc/tetr20/current
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